CVE-2021-27911
XSS vulnerability on contacts view
Description
### Impact Mautic versions before 3.3.4/4.0.0 are vulnerable to an inline JS XSS attack through the contact's first or last name and triggered when viewing a contact's details page then clicking on the action drop down and hovering over the Campaigns button. Contact first and last name can be populated from different sources such as UI, API, 3rd party syncing, forms, etc. ### Patches Upgrade to 3.3.4 or 4.0.0 ### Workarounds No ### References https://github.com/mautic/mautic/releases/tag/3.3.4 https://github.com/mautic/mautic/releases/tag/4.0.0 ### For more information If you have any questions or comments about this advisory: * Email us at [security@mautic.org](mailto:security@mautic.org)
How to fix CVE-2021-27911
To remediate CVE-2021-27911, upgrade the affected package to a fixed version below.
- —upgrade to 3.3.4 or later
Is CVE-2021-27911 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (1)
- from 0, < 3.3.4
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.3 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H |